Android : Transparent Background Overlay Of SurfaceView Broken On 1.5?
Jun 17, 2009
I believe I have found a graphics bug introduced in the 1.5 platform. I'm looking for some confirmation (or a description of what I'm doing wrong) before reporting it as a real bug.
I have a SurfaceView that fills the screen and on top of that I have a LinearLayout that wraps some other components that overlay the surface. These other components are not visible most of the time, and the LinearLayout has a transparent background so that the SurfaceView is unobstructed until the other components are made visible. Under 1.0 and 1.1 this all worked with a background of #00000000 for the LinearLayout. Now under 1.5 there is a black rectangle obstructing my surface unless I give the LinearLayout background some color. I can still keep the transparency so it is still invisible as it should be but it is strange that it can't be black and invisible anymore. My layout is below. The background of #00000001 works, but changing it to #00000000 results in a black rectangle. code...
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Aug 19, 2009
seems pretty straightforward.
CODE:..............
But doesn't work!
It scrunches the layout background as the background to each button, I want it to span all three buttons...
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Apr 27, 2010
Is there anyone who knows how to overlay a GLSurfaceview on a Surfaceview? The Surfaceview is used for the camera preview..
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Feb 11, 2009
I have a SurfaceView that is covering a portion of its parent, a RelativeLayout. I have a background image covering the full RelativeLayout area, and this is my Activity's main layout.
I would like to have the SurfaceView be transparent so that I can see through to the background image on its parent RelativeLayout. I have tried the approach shown in the API Demos example TranslucentGLSurfaceViewActivity, but this succeeds in making the transparency go all the way through my Activity to my desktop!
I'm using the "style/Theme.Translucent" theme on my activity, and setting this on my SurfaceView: mySurfaceView.getHolder().setFormat(PixelFormat.RGBA_8888);
The transparency to the desktop it kinda cool, but not what I'm trying to do! Is it possible to make a SurfaceView transparent only through to its parent?
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Aug 10, 2010
I'm passing a bitmap through a bundle to an activity which I called cameraView on which the user has access to the camera of the device. I'd like to overlay that bitmap with transparency using the camera as the background. Is it possible? to put the bitmap in front of the camera? And how can I change the transparency level? Here is my code: This is the camview.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical">
<SurfaceView android:id="@+id/surface_camera" android:layout_width="fill_parent"
android:layout_height="10dip" android:layout_weight="1"> </SurfaceView> </RelativeLayout>
And this is the java:
public class cameraView extends Activity implements SurfaceHolder.Callback{
SurfaceView mSurfaceView; SurfaceHolder mSurfaceHolder;
Camera mCamera; boolean mPreviewRunning=false; private Context mContext = this;
public void onCreate(Bundle icicle) { super.onCreate(icicle);
setContentView(R.layout.camview); Bundle f = getIntent().getExtras();
picture = f.getParcelable("bitmap"); mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera); mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this); mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
} @Override // Create the Surface and Open the Camera
public void surfaceCreated(SurfaceHolder holder) { mCamera = Camera.open();
} @Override // Reacts for camera changes public void surfaceChanged(SurfaceHolder holder,
int format, int w,int h) { if (mPreviewRunning) { mCamera.stopPreview();
} Camera.Parameters p = mCamera.getParameters(); p.setPreviewSize(w, h);
mCamera.setParameters(p); try { mCamera.setPreviewDisplay(holder);
} catch (IOException e) { e.printStackTrace();
} mCamera.startPreview(); mPreviewRunning = true;
} @Override // When the camera is closed
public void surfaceDestroyed(SurfaceHolder holder) { mCamera.stopPreview();
mPreviewRunning = false; mCamera.release(); }
// When the picure is taken. This method gives the byte[] of the picture
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] imageData, Camera c) {
} };
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Mar 27, 2009
Code...
Is there a way to set the background of the SurfaceView just like a 2D view?
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Jul 27, 2009
1)Which is better for developing a game.
a)Using XML layouts
b)Using Custom layouts with Surface view
2) while making a custom view using Surface view... do we need to have a secondary thread to implement the surfaceholder.callback()......
My code below does not show the activity in grey background as i have coded... do i need to use the unlockcanvas and all ,,but i havent used the secondary thread
CODE:..............
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Jun 24, 2010
How can i make the background 50% transparent? Let's say the background of an AbsoluteLayout so it's dark but you can still see through it?
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Apr 22, 2010
My use case is writing an overlay controller activity for a landscape camera preview. I followed the instructions from a couple of tutorials for writing a transparent theme.When I start this activity from my root activity, the layout gets drawn correctly, but the background stays black. I tried to use @android:style/Theme.Translucent instead, but this Theme inherits the orientation from the calling activity (landscape) and thats not what I want.The application holding the camera preview is set to landscape view as it does not display the preview correctly in portrait orientation. (see old google bug report)What I wanted to do was to put an independent activity for user interaction interface in front of the camera surface holder (this activity should be set to 'portrait', or even better to 'sensor')
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Aug 19, 2009
I want to be able to specify an android:src, but I want android:background="" - complaints that string types are not allowed when compiling.
I basically want a button without any background (but that *does* have a 'src').
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Sep 29, 2009
I am using a web view in which i am adding a image view..now i want to set the background of this image view transparent.i hv tried setting code...
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Sep 24, 2010
In my android application i am using progress dialogue in my splashscreen.
I would like to see only the progressbar with loading message without the background.
Is there any way that i can change the background to transparent in android.
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Jul 14, 2010
How can I set the Background for a button to a transparent Color, like transparent Blue for eg, instead of a solid blue? When I use button.setBackgroundColor(Color.BLUE) it sets it to a solid blue.
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Oct 29, 2010
I have run into an requirement of my application that i cant find a way to do this.
I need my application to be fullscreen and no title bar (done), and this application will have a background image. However, all the activities/views of my application must be transparent/translucent so the application background will be visible all the time behind the information i am displaying.
Basically i would like to have this behavior
http://www.geeky-gadgets.com/wp-content/uploads/2010/05/amazon-kindle-android-app.jpg
supousing that the image you see is not the phone wallpaper, but the application background image. What would be the application configuration in the manifest file and what would be the configuration for eacy activity/view?
I also noticed that, i need to setup each activity to be fullscreen without title bar. Is there a way to do this globaly in the application so all activities will behave this way?
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Jul 25, 2010
OK, So I want to set the background to a transparent image and change the color of the background on an event firing. I can set the background image to a resource in an xml file, and I can also change the color of a TextView on event firing, but for some reason I can't do both at the same time. Do I need to create a drawable or something? Also, how do I reference the top level LinearLayout. I'm programming using eclipse JEE Galileo with the ADT Plugin and the android sdk. O.S. android 2.1-update1 (eclair). My friend can do it in actionscript and I have to do it in java to beat him lol.
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Jan 26, 2010
Why i get a Black screen with a translucent transparent background on my HTC Hero ? I used the code sample.It is OK with the emulators 1.5 and 2.1.Is there a way to have it on my Hero ?
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Mar 3, 2009
I have problem with the List view scrolling. Here I have a list view contains more 50 items. I am setting the list view background as transparent. While scrolling the list view it is showing with black background. Can any one tell me how to remove this black portion?
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Oct 6, 2010
I need to display image has background and transparent text at particular location of the image text,here my problem is it display well in some devices and not being proper alignment in larger screens,even i used separate resource file like layout,layout-large,layout-small but in some case it's not working well,i set. Code...
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Nov 19, 2013
I'm using latest Cyanogenmod ROM on my Galaxy Nexus. Changed the Softkeys and Navbar to transparency and it looks great. But it seems that in standard design there is an gradient Overlay on the Background Image?!
Is there anyway to remove that? i will attach screenshot. If I'm changing the Design to any other Theme like "holo glass" it works fine...no overlay, nothing. So there should be a way by decompiling SystemUI or something?
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Oct 11, 2010
I encountered this problem when updating my background to use a 9-patch image. The layout is fine on different screens using different sizes of the same image, but when I change the image to be a 9-patch it breaks the entire layout mysteriously.
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Jan 7, 2010
I'm using a ListView with a transparent background. It works fine in Android 1.5 & 1.6, but in Android 2.0 and later, the ListView background turns white while scrolling. I want it to stay transparent, just like in 1.5 & 1.6.
Does anyone know what's going on, or better yet, how I can get this working correctly?
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Aug 30, 2011
Any good quotes widget with transparent background, which is free as-well.
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Oct 6, 2010
I'm looking for a transparent background for the stock Weather widget(2.2). I found a few apks but they won't install. I found a couple .zips but they just for close, I think they are for 2.1.
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May 1, 2014
I have a bunch of png images that I imported to my phone from my PC. I dumped them straight in my DCIM folder.
On the PC, these images have transparent backgrounds, however, when I view them using androids gallery app, the background is black. Similarly, when using these images as stickers for my text messaging app (Naver Line), the backgrounds will also show as black.odate.
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Aug 20, 2010
One using a Surfaceview, and the other using a custom view. According to the android SDK development guide, using a surface view is better because you can spawn a separate thread to handle graphics. Th SDK development guide claims that using a custom view with invalidate calls is only good for slower animations, less intense graphics.However, in my simple app, I can clearly see that using a custom view with calls to invalidate seems to render faster.What do you guys know/think about this?My touchEvent code is exactly the same, and my drawing code is exactly the same. The only difference is that one is all in the UI thread, and the other is using a tread to handle the drawing.
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Aug 18, 2010
I like tu use the MapActivity to display some pins. When a pin is pressed i like to open a description. This can I obtain following the tutorial: http://developer.android.com /resources /tutorials/views/hello-mapview. But now I like to put a button on the overlay window. That button should open a detail activity. How can I make this? How is possible to personalize the overlay "info window"?
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Jul 9, 2010
I have already found how can I do an ImageButton with Transparent background, but I would like to ask, how can I set the effective of it ?
How can I do it more transparent ?
My way as I do it: <gradient android:startColor="#aaffffff" android:endColor="#aaffffff" ...>
What should I write in to the color to be more transparent ?
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Mar 25, 2009
Im creating a simple game using a SurfaceView for drawing the Graphics. It works fine, but now I tried to add a title screen, which is (for now) only a LinearLayout and a Start-button, specified in XML. However, when I click this button and try to switch to my SurfaceView (By doing setContentView(R.layout.game), the screen turns black. But if I do setContentView(R.layout.game) immediatly in my Activity.onCreate it works. But not if I start with my Title-screen and then try to switch
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Apr 30, 2009
I am finally testing my application on a G1 and even though it works fine on the emulator, it crashes on the G1
It crashes when it does:
CODE:.........
And the view is defined like this:
CODE:..............
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Jun 16, 2009
I want to play 2 videos one after one minimizing delay between each video. so I created 2 mediaplayer, one playing the current video and the other preparing to play the following video.
The 1st video is played correctely but I couldn't get the video track of the second video. only sound without any error.
This is my source code : (note that here, I am using files on sdcard but the application will use files on a web server. that's why I need to prepare the second video while the 1st is playing)
CODE:...................................
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